Add splunk extend plugin and bump other plugins (#5233)
Add splunk extend plugin and bump other plugins (#5233)


edx/configuration,appsembler/configuration,stvstnfrd/configuration,EDUlib/configuration,arbrandes/edx-configuration,mitodl/configuration,appsembler/configuration,arbrandes/edx-configuration,appsembler/configuration,mitodl/configuration,arbrandes/edx-configuration,arbrandes/edx-configuration,stvstnfrd/configuration,EDUlib/configuration,edx/configuration,stvstnfrd/configuration,stvstnfrd/configuration,EDUlib/configuration,EDUlib/configuration,edx/configuration,mitodl/configuration,EDUlib/configuration,edx/configuration,arbrandes/edx-configuration,mitodl/configuration,appsembler/configuration,stvstnfrd/configuration